Welded steel cooling plates



Nov. 3, 1931. B. J. HARLAN 1,830,318

WELDED STEEL COOLING PLATE Filed Nov. 18, 1927 2 Sheets- Sheet l fr V 5 INVENTOR J Harlan NOV. 3, 1931. B 1 HARLAN 1,830,318

WELDED STEEL COOLING lPLATE Filed Nov. 3.8, 1927 2 Sheets-Shen 2 yIlllllimb uli llilllM ""K INVENTOR etfg'aI/L JHarlalz BY, W-@

vPatented Nov. 3. 19317- y' BENJAMIN nJ. Hannan, or JorrNs'roWN, rn'NNsYLvANIAgAssrGNoR 'ro -BETHLEHM f;

'sTnELeoMPANY i Wanneny STEEL coonINGfrLA'rns l t' 'n Application `led. November'li, Serial N'o. d234,162.

f Myv invention relates to coolingV plates for use in; connection vwithlblast'furnace construction. These cooling yplates are usually inserted in walls ofthe lowerportionfof blast furnaces andV form a part of the wall lstructure band have pipe connectionby means of which water` is kept constantly. circulating through'y thefplates for cooling purposes. rYlhisftyf of cooling plate is commonly calleda bosh plate because it is usually inserted in the bosh wall of the blast furnace,.which isfthat part `of the, lower portion of the furnace wall Y f "whichextends'y downwardly: and inwardly from the mantle of lthefurnace, tothe wall which surrounds the hearth.`r Y These cooling` platesare also sometimes used in the stack' wall ofthe furnace above'Y the mantleand in Y.fthe side walls which surround the hearth.

- vHeretofcre it has been the usual practice to u f :make bosh" plates of'a singlel piece by'casting,

' and generally, they were made ofcopper or A bronze. lThese castingsaare "expensive and Y Y areo'ftenfound to=be` defective on account of" the diiculty vin casting." thebaiiles andouter wallso'f the bosh platesf-inone4 piece and 'in g removing the core material; afterjcasting the Y 'innerwall'y remains rough whichk allowed the collection of sedimentland preventeduniform water circulation throughout the entire plate.

- One of theobjects'cf invention isfto makea vbosh plateV of V-rolledplate metal preferably of steel. of the `requiredthicknessthe parts of which areffrstcut'froma flat plate and, whererequired, :bent into thedesi'red 2 form and then welded together. Y

',Another object of .myninvention is to pro-VV duce a bosh plate in suchv akmanner thatits .installation willV not weakenv the furnace Another object ofmyi'nvention sto vconstruct the back wall ofthe bosh plate ywith a Alaterally Yextending flanged edge y having vrticalv slots `formed therein through jwhich bolts are inserted" 'forsecuringthey bosh plate 3.3' "to ythe outer shell of )the v'blast vfurnace there- 'Yb'y' allowing the boshV to mcv'e vertically,

hould thefurnace lining move, but'the'pilate ilL remain fixed sh'ouldtfhe refractory lini Y. mgl-fail'atovezor below eheiboshplae. f

'12.30F' Another advantage fo'ff myfinvention'isthatjf the une. Iii-III of Fig. e;

f tFi'gs'. 5 and 65 of construction'.-

thestrength of steel makes the replacement yeasierf and more desirable, should the bosh eyes or lugs willpull oif-whenattemptingto remofvle'from the 'furnace,7bosh plates made cfcopper -orbron'zeg and' still another object o'fmy invention is the cheapne'ss of construcplate have to ybe changed. Ever-so often'the Y tion,.fa`s the cost of a bronze or copper .bosh

plate4 is about six times greater than that of "applicant when vccnstructedfof rolled steel plates. v i y,

Vith"y these objects iny viewl my invention consists' in the .construction and knovel combination: and arrangement of' parts, hereinafter morer fully described,v illustrated in the ac'coinp'a'fnying drawings,` and pointed out in the' claims` hereto appended.

f Having thus'fgiven a general` description ofy my inv'ention',--Iy will now,y in orderv to f make the same moreiclear,r referto theV accompanying two sheets f drawings in;wh'ich like charp Aactersiof reference indicate like 'partez-1 Figel is aside elevation of-one form of my -ir'nprovedbosh plate,jand showing enough of lthe'b'last furnacewallin section to illustrate [the application of my invention;

. 'F'glQ isa rear end elevation of the bosh .plateV sliownfinFig. lgwithga portion of the ba'ck'wall plate-,broken away to moreY clearly show its construction;

Fig. V3.;isj a longitudinal section taken on Fig. '4f illustrates in detailthe different rparts from whichthe bosh plate is constructed; v

Figs. 5f and 6y are perspective views illus- Ytrating: the manner of assembling, and welding the diiferenty par-ts; together and just Y before the final operationfof welding the nose and top plates tothe rear sides and bottom ...Wallsregpectivelygpand i i Figs. 7 and Sia're perspective views similar v ut showing a modified form p `liefe'rring,now tothe characters rofrefer# "encelo'n the drawings; and; moreespecially to Figs.' 1 andf both inclusive; lindicates a yportion 'oftherefractory liningt ofablast furnace havinga'recessdfor'med therein asy at22-.v I They refractory lining issurroundedby'` an outer shell or casing 3, having an openingv tendslaterally, allvaround thel rear'end of the bosh vplate as at 7 'having vertical Vslots formed therein as at 8 which register with holes`9in the casing throughwhich bolts 10 are inserted for securing the bosh plate to the casing 3. VThe headsof the` bolts 101 being embedded in the refractory lining and the shanks ofthe bolts are inserted through the [holes :9' in the `furnace casing, while the threaded 'ends ofthe boltsextend outwardlyk l through the slots 8' and havenuts screwed Vthereonas at `11. With thisconstruction vof 'having slotsin the back wall of the bosh plate allows for a slight'vertical movement should 4the furnace lining move, but will remain fixed ,wall of the bosh plate is shown at 45,*and one should the refractory lining fail above or below the bosh plate 12jindicates the bot-v tom wall of thel bosh plate,`1 3 and 14 the side Cal walls, 15 the f orwardend/or nose, 16V the top wall, 17 thecentral baffle and-18 and 19 the Vtwo intermediate bafiles located between the central baffle 17 and-the side wall. The intermediate'baiiies arewelded tothe inside of the backwall and tof the topof the bottom wall 12, the forward ends'being spaced apart from the nose wall to allow for water circulating pas- A sages Varoundy their ends, while the central baffle is'weldedat one end tothe nose wall and thefto'p wall and stops short vof the lback wall 'to allow fora -water'circulatingpassage atj `this point... It will' also"'be noted that the intermediate baffles are not attached to the i v Y u .5 anrd are then welded together the top havtop wall of the bosh` plate and the central V'baflie'isnot attachedto the bottom wall which adds gri-ratly to the ease of assembling as will bereadily understood by referring to Figures 5 and l6. -j i' The Vback `'vided vwitha screw threaded inlet opening 20 for receiving pipe connection 21 bymeans of which water under pressure vis admitted to the bosh plate, passes through the Achannel 22 formed between the side wall 13and one of the intermediate baflies 18, thence into passage 23 betweentheen'd of baffle' 18 and nose vwall-15" into channelr24, between baffles 18 and 17-and through passage25;channel. 26, passage` 27, channel 28 and .then vpasses out of [the Vbosh plate? through 'the 'outlet' pipe 29 which@ is connected( to -the'screw threaded opening 30 formed in the-backwall 6; Open- 50ings-31andf32 are alsvprovidedin theback j Awall-6 normally' closed Vbyineans of plugs33 ifanw'clj34.V These holes provide means for in*V it is in service in the blast furnace.

5 indicatesthe bosh'plate which isi vwall 6 vof vthe kbosh l plate is prof Shanks 37 and 38 are screwed into openings 39 and 40 in the back walland welded thereto.

In Fig.'4 I have illustrated in detail the different parts from which the'bosh plate is constructed, these parts with the exception of the eyes are cut of fiat rrolled plates. The back wall plate 41 isV preferably made of thicker. material than the otherparts and is formed with the vertical slots 8 and screw 'Y threaded holes for receiving the inlet and outlet pipe connection, the inspectionV holes for receiving the plugs andfor the Shanks of the eyes.

Theback plate is then cambered to correspond to the. ,contour of the outer shell of the blast furnace wall. yThe bottom and side .walls are formed integral', theblankbein'g cut yfrom a plate tothe formindicated at 42, the

sides .being bent at right angles to the bottom plate onpthe dotted lines 43'. 44 indicates'the blank for. the top wall of the bosh plate which irstfcut from a flatplate in the formfshown yand then cambered to arched shaped form. f

The part whichforms the nose or front of the three baffle parts 'as at 46 all of which are of the same size'and shape. Y

Afterthe vdilferent parts fromr which the `bosh plate isconstructed have .been formed,

' back walls, as illustrated inFigz. The top wall, nose and central baflle arethen welded together, as illustrated in Fig. 6.

Thetwo'assembled parts shownin Figs.

ing its edges welded to the sides and inner ,side14 of the back plate and the edges of the nose. to the front edges of the bottom wall and sides respectively. Y f

In Figs'. 7v and 8 I have shown a modified Vforni of bosh plate in which the batlies are arranged differently, but otherwise the outside wall construction is thesame and the same reference numerals will be given them. In this Amodified construction I have shown an 'intermediate L-shaped baille 48 Welded to the'bottom wall'a'nd the rear side of the back plate, and a short` transverse sideV bathe 49 Water enterstheinlet port asV at V50, circulates through k.the channel'l" through passage 52 into compartments 53 and 54 and ing 5 5.

'In bothof the constructions illustrated and described the cooling fluid isyadapted to flow. in, continuous 'sinuous channel -or pasthen VVpasses kout A,through the voutlet open-V n i 'y y sageway from the inlet to the outlet connec-` tions. t' Y i IBosh plates formed in the mannerk describedtcan be made much quicker and cheaper than by thevusual method of casting, will have a smooth interior surface there-k by preventing, to a great extent the collec- 1 V tion of sediment andvallowing` a free circulation of cooling medium at all times and at the same t-ime have greater strength and durability'than those nowy in general use.

Although I have shown and described my invention in considerable detail, I do notwish yto be limited to the exact and speciic details t shown and described, but may use such sub- Alstitutions, modiiicatonsfor equivalents there- Y ofy as are lembraced within the scope of my in- `vention or as set forth inthe appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

` l. A water cooledrbosh plate, comprising ya hollow sheet metal body portion, a back i tomand back walls at anintermediate point wall having a lateral extension extending entirelyl around the back end of the bosh4 plate, slots formed in the lateral extension in spaced relation to each other near the end and at intermediate points above and below the body ofthe bosh plate, said upper row of.r slots beingl in vertical alignment with the lowerrow of slots, baiiles secured to the 'bot-y and-unattached tothe top wall, and a central Yof the bosh plate.

baflie secured to :the top'and forward walls and unatt'ached to the bottom and back walls l2Q Aiwater cooled bosh plate,comprising` a hollow sheet metal body portion, side walls I formed integral with the'body portion, a top plate secured to the side plates, a front end plate secured to the bottom, side and top plates, aback wall plate secured to the top side and bottom'plates Yof larger area than the rear end of the bosh plate and adapted to form a lateral extension extending entirely around the back end of the bosh plate, slots formed in the lateral extension near'the en'ds and at intermediate points, the slots near the .top edges of the flange being in Vertical alignment with theslots at the bottom edge of the a'nge, Ybaiies secured to the bottom and back wall at intermediate point-s and spaced apart from theitop wall, and a'central baiile secured yto the top and forward Vwalls and spaced apart from the bottom and back walls of the bosh plate.V Y e y In testimony whereof I hereunto afliX my signature. Y A v f 1 t BENJAMIN J. HABLAN. 

